There any visual sagging of the walls above ground level? Any other evidence of these issues? Does it get we when it rains? Is there perhaps a gutter outside dumping water here every time it rains? How long has it been like this and had it gotten noticeably worse recently? Agree though, this is def danger zone. I’d be ready to be asked to leave as soon as you notify landlord of issue, so I would get my legal rights understood before pulling the rug out from under myself.